Ps-vita remote play -Cross controller funtion

Suddenly I have an urge to try those funtions of vita, yet I couldn't success, or my sony systems. Then I googled a bit about the problem, lots of people are can't use this functions altough they seem so easy to configure.Sony tease those functions alot yet did they just can't? or I have some kind of problem on the way?

I know all the titles and have some of them, for example tokyo jungle, yet I just can't connect my vita to my ps3, they don't see each other even I sync them for a few times... Anyway, remote play is not working, at least not for me..

very few games work via remote play, Lair was one of the first, supposedly the GoW collection and the Ico/sotc collection. Many of my downloadable games dont seem to work but I just got pixeljunk shooter to start.